@misc{oai:repo.qst.go.jp:00079426,
 author = {M. Tokitani and M. Miyamoto and S. Masuzaki and Y. Hatano and S.E.,  Lee and Y. Oya and T. Otsuka and Oyaizu, Makoto and Kurotaki, Hironori and T. Suzuki and Hamaguchi, Dai and Hayashi, Takumi and Asakura, Nobuyuki and A. Widdowson and S. Jachmich and M. Rubel and Oyaizu, Makoto and Kurotaki, Hironori and Hamaguchi, Dai and Hayashi, Takumi and Asakura, Nobuyuki},
 month = {May},
 note = {Surface characterization of  bulk tungsten tiles (W lamellae) used during the first campaign of JET with the ITER-Like Wall (JET-ILW) was performed by means of microscopy and tritium imaging techniques. This is the first report regarding very detailed structural studies of W lamellae from the JET-ILW divertor. A special feature of the W lamellae installed in JET is the intrinsic network of micro-cracks detected on surfaces of the as-manufactured material. Analyses of different W lamellae samples on the plasma facing surface reveal two types of surface structures caused by plasma impact: areas with strong erosion and regions of mild plasma interaction. In regions of strong erosion, a thin modified layer (thickness of ~20 nm) with a high density of defects including bubble-like structures has been formed. In addition, features indicating melting along edges of micro-cracks with the micro-scale plastic deformation have been identified., 17th International Conference on Plasma-Facing Materials and Components for Fusion Applications},
 title = {Surface morphology of the bulk tungsten divertor tiles  from JET ITER‐like wall},
 year = {2019}
}